Hi,
> -----Original Message-----
> From: Olivier Matz [mailto:olivier.matz at 6wind.com]
> Sent: Friday, January 30, 2015 9:16 PM
> To: dev at dpdk.org
> Cc: Ananyev, Konstantin; Liu, Jijiang; Zhang, Helin; olivier.matz at 6wind.com
> Subject: [PATCH 12/20] testpmd: introduce parse_vxlan in csum fwd engine
>
> Move code parsing vxlan into a function. It will ease the support of GRE
> tunnels and IPIP tunnels in next commits.
>
> Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
> ---
> app/test-pmd/csumonly.c | 68 +++++++++++++++++++++++++++------------
> ----------
> 1 file changed, 37 insertions(+), 31 deletions(-)
>
> diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c index
> 0b89d89..52af0e7 100644
> --- a/app/test-pmd/csumonly.c
> +++ b/app/test-pmd/csumonly.c
> @@ -93,7 +93,6 @@ struct testpmd_offload_info {
> uint16_t l3_len;
> uint16_t l4_len;
> uint8_t l4_proto;
> - uint8_t l4_tun_len;
> uint8_t is_tunnel;
> uint16_t outer_ethertype;
> uint16_t outer_l2_len;
> @@ -191,6 +190,34 @@ parse_ethernet(struct ether_hdr *eth_hdr, struct
> testpmd_offload_info *info)
> }
> }
>
> +/* Parse a vxlan header */
> +static void
> +parse_vxlan(struct udp_hdr *udp_hdr, struct testpmd_offload_info *info,
> + uint64_t mbuf_olflags)
> +{
> + struct ether_hdr *eth_hdr;
> +
> + /* check udp destination port, 4789 is the default vxlan port
> + * (rfc7348) or that the rx offload flag is set (i40e only
> + * currently) */
> + if (udp_hdr->dst_port != _htons(4789) &&
> + (mbuf_olflags & (PKT_RX_TUNNEL_IPV4_HDR |
> + PKT_RX_TUNNEL_IPV6_HDR)) != 0)
It seems that there is a bug, which is mbuf_olflags check.
It should be
(mbuf_olflags & (PKT_RX_TUNNEL_IPV4_HDR |
PKT_RX_TUNNEL_IPV6_HDR)) == 0).
> + return;
> +
> + info->is_tunnel = 1;
> + info->outer_ethertype = info->ethertype;
> + info->outer_l2_len = info->l2_len;
> + info->outer_l3_len = info->l3_len;
> +
> + eth_hdr = (struct ether_hdr *)((char *)udp_hdr +
> + sizeof(struct udp_hdr) +
> + sizeof(struct vxlan_hdr));
> +
> + parse_ethernet(eth_hdr, info);
> + info->l2_len += ETHER_VXLAN_HLEN; /* add udp + vxlan */ }
> +
> /* modify the IPv4 or IPv4 source address of a packet */ static void
> change_ip_addresses(void *l3_hdr, uint16_t ethertype) @@ -356,7 +383,6
> @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
> struct rte_mbuf *m;
> struct ether_hdr *eth_hdr;
> void *l3_hdr = NULL, *outer_l3_hdr = NULL; /* can be IPv4 or IPv6 */
> - struct udp_hdr *udp_hdr;
> uint16_t nb_rx;
> uint16_t nb_tx;
> uint16_t i;
> @@ -414,33 +440,15 @@ pkt_burst_checksum_forward(struct fwd_stream
> *fs)
> /* check if it's a supported tunnel (only vxlan for now) */
> if ((testpmd_ol_flags &
> TESTPMD_TX_OFFLOAD_PARSE_TUNNEL) &&
> info.l4_proto == IPPROTO_UDP) {
> + struct udp_hdr *udp_hdr;
> udp_hdr = (struct udp_hdr *)((char *)l3_hdr +
> info.l3_len);
> + parse_vxlan(udp_hdr, &info, m->ol_flags);
> + }
>
> - /* check udp destination port, 4789 is the default
> - * vxlan port (rfc7348) */
> - if (udp_hdr->dst_port == _htons(4789)) {
> - info.l4_tun_len = ETHER_VXLAN_HLEN;
> - info.is_tunnel = 1;
> -
> - /* currently, this flag is set by i40e only if the
> - * packet is vxlan */
> - } else if (m->ol_flags & (PKT_RX_TUNNEL_IPV4_HDR
> |
> - PKT_RX_TUNNEL_IPV6_HDR))
> - info.is_tunnel = 1;
> -
> - if (info.is_tunnel == 1) {
> - info.outer_ethertype = info.ethertype;
> - info.outer_l2_len = info.l2_len;
> - info.outer_l3_len = info.l3_len;
> - outer_l3_hdr = l3_hdr;
> -
> - eth_hdr = (struct ether_hdr *)((char
> *)udp_hdr +
> - sizeof(struct udp_hdr) +
> - sizeof(struct vxlan_hdr));
> -
> - parse_ethernet(eth_hdr, &info);
> - l3_hdr = (char *)eth_hdr + info.l2_len;
> - }
> + /* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
> + if (info.is_tunnel) {
> + outer_l3_hdr = l3_hdr;
> + l3_hdr = (char *)l3_hdr + info.outer_l3_len +
> info.l2_len;
> }
>
> /* step 2: change all source IPs (v4 or v6) so we need @@ -
> 472,7 +480,7 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
> if (testpmd_ol_flags &
> TESTPMD_TX_OFFLOAD_OUTER_IP_CKSUM) {
> m->outer_l2_len = info.outer_l2_len;
> m->outer_l3_len = info.outer_l3_len;
> - m->l2_len = info.l4_tun_len + info.l2_len;
> + m->l2_len = info.l2_len;
> m->l3_len = info.l3_len;
> }
> else {
> @@ -482,9 +490,7 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
> the payload will be modified by the
> hardware */
> m->l2_len = info.outer_l2_len +
> - info.outer_l3_len +
> - sizeof(struct udp_hdr) +
> - sizeof(struct vxlan_hdr) + info.l2_len;
> + info.outer_l3_len + info.l2_len;
> m->l3_len = info.l3_len;
> m->l4_len = info.l4_len;
> }
> --
> 2.1.4
